The gap thread - Page 1

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The gap thread

hoody2shoez Member Joined Aug 2017 Posts 3925 EE 100% (5) USA	Posted: 3/10/2024 11:38:06 AM EDT [Last Edit: hoody2shoez] Rules 1-no discussions. This is for documenting and quick reference only. 2-posts must have pictures 3-specs must be listed:handguard length, barrel length, attachment method, any other spec you deem important See first post for an example

hoody2shoez Member Joined Aug 2017 Posts 3926 EE 100% (5) USA	Posted: 3/10/2024 11:40:04 AM EDT [#1] Q 12" rail-measures around 11.75" at the wings. 12.5" criterion Griffin plan a flash hider Attached File

lxranes Joined Aug 2017 Posts 154 EE 0% (0) ID, USA	Posted: 3/10/2024 12:32:49 PM EDT [Last Edit: lxranes] [#2] Complete solgw 13.7 upper. 13" m76 hand guard. Dead air Sandman S

1168RGR

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Joined Jun 2022
Posts 2376
EE 100% (9)

SC, USA

Posted: 3/10/2024 12:44:51 PM EDT

[Last Edit: 1168RGR] [#3]

Ruler numbers should read upside down

1) Larue 7” (7.25” from receiver rail), Griffin taper mount, Faxon 8.5” ***9mm*** bbl

2) Griffin 11.5” SR rail (nominal=actual), Roscoe 7.5” ***9mm*** bbl, SiCo 3 lug, Omega 45k; 1.5” sticking out

3) Larue 9” (9.25” from receiver rail), Griffin Gate-Lok with overtravel stop (A2 FH), DD 10.3” bbl

1168RGR Member Joined Jun 2022 Posts 2377 EE 100% (9) SC, USA	Posted: 3/10/2024 12:57:09 PM EDT [Last Edit: 1168RGR] [#4] ruler numbers should read right side up 1) URX4 10” (nominal=actual), Griffin Gate-Lok with overtravel stop washer, M4SDk alongside at mounted length, BA 11.3” bbl 2) DDM4 10” (10 1/8), Griffin taper mount, XCaliber 12” 9mm* bbl *modified for 9mm

1168RGR

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Joined Jun 2022
Posts 2378
EE 100% (9)

SC, USA

Posted: 3/10/2024 1:12:48 PM EDT

[Last Edit: 1168RGR] [#5]

ruler numbers should read upright. Actual gaps are 11/16, or just under 3/4.

1)URX4 10.75” (actual=nominal), Griffin Gate-Lok with overtravel stop washer, BA 12.3” bbl

2) Larue 11 (and 3/16)”, Criterion Core 12.5”, Griffin Taper

3) Larue 11, New Frontier 12.5” ***9mm***, (actual length is 13”), Griffin taper

4) Larue 11, Griffin taper, Hodge 12.5” bbl

Notice that 9mm barrels are about 1/2 inch shorter than 5.56 barrels externally, when both measure the same using ATF method internally.

1168RGR Member Joined Jun 2022 Posts 2379 EE 100% (9) SC, USA	Posted: 3/10/2024 1:22:51 PM EDT [#6] ruler should read upright. Actual gap is 1.25” 1) RIS II 12 (and 1/2)”, Colt 14.5” bbl 2) DDM4 12 (.4)” Noveske 14.5” stainless bbl

1168RGR Member Joined Jun 2022 Posts 2380 EE 100% (9) SC, USA	Posted: 3/10/2024 1:41:22 PM EDT [#7] ruler numbers should read upright. Top two gaps are 1/4”. 1) Larue 12 (.3)”, MOS Tek 13.5” bbl 2) Wolfpack Armory 16” pre-production gun with 15” rail, Griffin taper mount 3) PSA K-Mart 605 FSB/16” with Griffin Gate Lok and overtravel stop washer

aod886 Member Joined Aug 2010 Posts 5279 EE 100% (4) OH, USA	Posted: 3/10/2024 1:50:49 PM EDT [#8] • Troy Alpha Rail- 9" •Unknown Barrel- 10" • Standard GI A1 Flash Hider (Unknown MFG) • Griffin Armament M4SD (Gate Lok) Attached File Attached File

1168RGR Member Joined Jun 2022 Posts 2381 EE 100% (9) SC, USA	Posted: 3/10/2024 1:55:11 PM EDT [#9] ruler numbers should read upright 1) Larue 13”, measured, WOA SPR 18” bbl, 2-piece Allen/Ops SPR mount, probably from OCL 2) URX4 14.5 (14 11/16”) rail, Faxon 18” Gunner, Griffin taper mount. Gap is 2 11/16” PM me if y’all need clarification on these pictures and I’ll edit my posts next time I’m bored.

Underaid702 Joined Jun 2022 Posts 194 EE 100% (1) NV, USA	Posted: 3/10/2024 4:30:38 PM EDT [#10] 10.3" Daniel Defense MK18 RIS II Surefire 4 Prong SureFire RC2

RDTCU Member Joined Oct 2008 Posts 46135 EE 100% (29) SC, USA	Posted: 3/10/2024 5:11:07 PM EDT [Last Edit: RDTCU] [#11] 4" FX9 Cheapo Davidson 4" handguard YHM R9 with SRX mount 0.026" gap Attached File Attached File

Underaid702 Joined Jun 2022 Posts 195 EE 100% (1) NV, USA	Posted: 3/10/2024 5:35:49 PM EDT [#12] 7.94″ 300 Blackout Cherry Bomb muzzle brake by Q 7” NHR handguard with the 7.94” barrel will return a .060” clearance from end of handguard to barrel thread shoulder Plan B attachment Dead Air Nomad30

Deadsquiggles High Functioning Child Joined May 2015 Posts 1088 EE 95% (21) VA, USA	Posted: 3/11/2024 6:33:52 AM EDT [#13] 11.5” BA barrel, Griffin Recce 5 Mod 4, with Geissele Mk4 Federal rail. Gap to the back of the muzzle brake is about 13/16” and gap to the back of the suppressor is 7/8”. I’ll update it after I get my 10.5” Mk16 in hand and swap rails. Ideally it closes the gap by exactly 1/2” but we’ll see. Attached File Attached File

11boomboom Member Joined Oct 2020 Posts 6459 EE 0% (0) TX, USA	Posted: 3/11/2024 9:43:01 AM EDT [Last Edit: 11boomboom] [#14] Geissele Mk.8 9.3" MLOK rail 10.5" PSA Nitride Barrel YHM Phantom QD with YHM Turbo T3 It's about 1/2" of space before the back of the muzzle device Attached File . Attached File
	Why is the sky blue? What makes the green grass grow?

spyderboy03

Joined Sep 2004
Posts 7275
EE 100% (161)

MT, USA

Posted: 3/11/2024 3:49:17 PM EDT

[Last Edit: spyderboy03] [#15]

13.5" tabbed Geissele Mk16 chopped to 11.75"
12.5" Geissele barrel
YHM Turbo K
YHM sRx adapter
YHM sRx long flash hider (YHM sRx mini brake would cut at least .2" off of gap)
Gap .35"
This was originally cut for plan A on a 12.5" Criterion Core barrel. Wish I would have left the 1/8" of so that I trimmed after the initial chop.

9.3" Geissele Mk16 chopped to a hair over 7-11/16"
8.5" Criterion Core .300 BLK barrel
YHM Resonator K
YHM sRx adapter
YHM sRx mini brake
Gap .0975"

11B3XCIB

Joined Apr 2012
Posts 1488
EE 100% (17)

SC, USA

Posted: 3/11/2024 6:05:27 PM EDT

[Last Edit: 11B3XCIB] [#16]

Rail: Centurion Arms 13” CMR MLok
Barrel: Criterion 13.9” 5.56 (barrel isn’t true 13.9”, more like .7”)
Mount: Griffin Armament 2.75” flash hider P/W
Suppressor: Griffin Armament Recce 5

FH only for reference:

Before I got the 2.75” FH, I had a micro FH that tucked a portion of the taper mount adapter for my Optimus Micro under the rail:

11B3XCIB Joined Apr 2012 Posts 1489 EE 100% (17) SC, USA	Posted: 3/11/2024 6:26:56 PM EDT [#17] Rail: 9.5” Geissele Mk14 Barrel: 10.5” FN 5.56 Muzzle device: Griffin EZ brake Suppressor: AAC Mini-4 with Ecco HUB conversion

135Patriots Member Joined Sep 2018 Posts 3663 EE 100% (58) TN, USA	Posted: 3/13/2024 6:19:43 PM EDT [#18] Attached File 10.3" barrel RIS III 9.55" handguard Rearden SPB LPM Torch with a Diligent Defense Zilch hub mount

THEdtw Joined Jan 2017 Posts 626 EE 100% (106) MN, USA	Posted: 3/14/2024 7:51:04 PM EDT [#19] 10.5 RIS III, 11.3 Wilson Combat, SF4P

hoody2shoez Member Joined Aug 2017 Posts 4049 EE 100% (5) USA	Posted: 5/7/2024 1:38:03 PM EDT [#20] Bump to keep from archive

RM06 Joined Jan 2007 Posts 318 EE 100% (70) CO, USA	Posted: 5/9/2024 8:54:29 PM EDT [#21] Griffin Armament Low-Pro Rigid MLok Rail - 8.6" Ballistic Advantage 9" .300 BLK Silencerco ASR Single Port Brake & Omega can

DefenderAO Constitutional Republic /= Democracy Joined Dec 2008 Posts 42648 EE 100% (63) TX, USA	Posted: 5/10/2024 12:19:54 AM EDT [#22] Some tight gaps...
	Those who would give up essential liberty, to obtain a little temporary safety, deserve neither liberty nor safety

amphibian Joined Apr 2001 Posts 6565 EE 100% (13) FL, USA	Posted: 5/10/2024 12:33:55 PM EDT [#23]

bradpierson26 Member Joined Dec 2008 Posts 81073 EE 100% (183) CO, USA	Posted: 5/10/2024 7:11:18 PM EDT [Last Edit: bradpierson26] [#24] Best gap Attached File Does this count? Not really what you want, huh? Attached File Attached File Attached File Or this? Attached File Large gap Attached File
	I wouldn't stand in front of a piss-filled supersoaker. Does that make it a good pistol? - Caboose314 I thought I was covered for 22 cans, but the NFAids is a bitch when it mutates - themagikbullet

RDTCU Member Joined Oct 2008 Posts 46310 EE 100% (29) SC, USA	Posted: 5/10/2024 7:34:34 PM EDT [Last Edit: RDTCU] [#25] Just waiting on my 5x5 to be approved Attached File Attached File

DefenderAO

Constitutional Republic /= Democracy

Joined Dec 2008
Posts 42649
EE 100% (63)

TX, USA

Posted: 5/11/2024 11:08:59 PM EDT

[#26]

Quote History

Originally Posted By bradpierson26:
Best gap

https://www.ar15.com/media/mediaFiles/184182/IMG_4738_jpeg-3210753.JPG

Does this count? Not really what you want, huh?

https://www.ar15.com/media/mediaFiles/184182/IMG_3112_jpeg-3210739.JPG

https://www.ar15.com/media/mediaFiles/184182/IMG_5264_jpeg-3210751.JPG

https://www.ar15.com/media/mediaFiles/184182/IMG_4280_jpeg-3210738.JPG

Or this?

https://www.ar15.com/media/mediaFiles/184182/IMG_2226_jpeg-3210740.JPG

Large gap

https://www.ar15.com/media/mediaFiles/184182/IMG_1956_jpeg-3210741.JPG

View Quote

Internet winner

Those who would give up essential liberty, to obtain a little temporary safety, deserve neither liberty nor safety

135Patriots Member Joined Sep 2018 Posts 3728 EE 100% (58) TN, USA	Posted: 5/11/2024 11:12:57 PM EDT [Last Edit: 135Patriots] [#27] Attached File ETA adding relevant details Handuard: FCD RHF4 9.5 Barrel: DD 10.3 Muzzle device: Griffin dual-lok brake Suppressor: Griffin HRT556

hoody2shoez Member Joined Aug 2017 Posts 4061 EE 100% (5) USA	Posted: 5/14/2024 11:40:48 AM EDT [#28] Reminder to read the rules. This thread is for people to quick reference if a particular mounting system will fit their handguard/barrel combo. Thanks

spyderboy03

Joined Sep 2004
Posts 7455
EE 100% (161)

MT, USA

Posted: 5/16/2024 10:45:25 PM EDT

[#29]

Quote History

Originally Posted By spyderboy03:
13.5" tabbed Geissele Mk16 chopped to 11.75"
12.5" Geissele barrel
YHM Turbo K
YHM sRx adapter
YHM sRx long flash hider (YHM sRx mini brake would cut at least .2" off of gap)
Gap .35"
This was originally cut for plan A on a 12.5" Criterion Core barrel. Wish I would have left the 1/8" of so that I trimmed after the initial chop.
https://i.imgur.com/UvBOcFA.jpg

View Quote

Replaced the long flash hider with the mini brake.
Gap .099"

135Patriots Member Joined Sep 2018 Posts 3732 EE 100% (58) TN, USA	Posted: 5/20/2024 11:43:28 PM EDT [#30] Attached File 10.3" barrel 9.5" RIS III Diligent Defense Zilch adapter+LPM Torch

RDTCU Member Joined Oct 2008 Posts 46338 EE 100% (29) SC, USA	Posted: 5/21/2024 9:34:16 PM EDT [#31] Black Rain 10.5" ALG 10" KVP direct thread mount Ecco 5x5 ~0.03" gap Attached File

Glocked

Joined May 2018
Posts 16824
EE 100% (34)

MS, USA

Posted: Today 10:00:29 AM EDT

[#32]

4.5” barrel
4.0” Hand guard
Griffin Ez-Lok SMG/PCC muzzle device.
Ti-Rant/Obsidian with Ez-Lok piston.

I don’t have any way to measure the gaps. You really can’t see it but there is a gap there. This setup 100% absolutely would not work without the Ez-Lok muzzle device acting as a barrel extension.

What’s going on underneath the rail

Ti-Rant

Obsidian

The gap thread

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