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1/25/2018 7:38:29 AM
Posted: 12/21/2005 1:03:05 PM EST
I need some input on cutting down a 20" barrel to 18". I have the means of doing so but my main concern is with the gas system. Is there gonna be a reliability conflict concerning the gas system if i go cutting off 2"? Such as the bullet not staying in the barrel with the full size gas system. Let me know if anyone has factual info that would yield it to be not a wise thing to do.
Link Posted: 12/21/2005 1:11:37 PM EST
[Last Edit: 12/22/2005 10:46:13 AM EST by Gunzilla]
Link Posted: 12/21/2005 1:23:56 PM EST
Alright ya an SPR build is what i have in mind. But I wasn't sure if SPRs use a full length gas system.
Link Posted: 12/21/2005 6:16:33 PM EST
My RRA 18" runs great , even with Wolf ammo,with a standard gas port. I have fired it in temps down into the low 40's with no function problems
Link Posted: 12/21/2005 6:46:44 PM EST
[Last Edit: 12/22/2005 10:46:30 AM EST by Gunzilla]

Link Posted: 12/22/2005 8:52:35 AM EST
Link Posted: 12/22/2005 8:57:43 AM EST
[Last Edit: 12/22/2005 10:46:47 AM EST by Gunzilla]
Link Posted: 12/22/2005 9:07:33 AM EST
I cut mine from 24 to 18 with no problem.

Link Posted: 12/22/2005 9:22:22 AM EST
Link Posted: 12/22/2005 10:08:53 AM EST
Link Posted: 12/22/2005 12:26:53 PM EST
Sounds good.
Link Posted: 12/23/2005 6:41:50 AM EST
i had a bushy 20" gov barrel cut to 18" and needed to open up the gas port to .090" to make it 100%.

i was shooting on a cool morning (about 45 degrees) and was getting some rounds that would not lock the bolt back on the last round in the mag. this was with winchester q3131 (not A).

other than that it cycled fine. i actually trying to sell the barrel now on the EE
Link Posted: 12/23/2005 7:14:41 AM EST
I had Gemtech cut my 20" KAC SR15 Match down to 18" - functions 100% with no change to the gas port or gas block. Both suppressed and un-suprpessed yield the same results.
Link Posted: 12/23/2005 9:37:41 PM EST
[Last Edit: 12/23/2005 9:40:22 PM EST by Randall_Rausch]
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