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Posted: 12/23/2023 9:28:09 PM EDT
I have my sig spear in 16”. I’d like to cut it down to 14.5. Anyone down this and how has it affected the rifle?
VP
Link Posted: 3/5/2024 12:40:57 AM EDT
[#1]
I’d like to know as well
Link Posted: 3/5/2024 1:04:14 AM EDT
[#2]
If you qualify to buy from Proven Outfitters, they have 14.5 SPEAR LT barrels.
Link Posted: 3/5/2024 1:41:33 AM EDT
[#3]
I had mine cut down to 13.9" and pinned a flash hider. It shoots extremely smooth and handles very nice. Took it to 740 yards last weekend with some 75gr match ammo. D Wilson MFG did the work and it came out great.
Link Posted: 3/5/2024 9:31:00 AM EDT
[#4]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By MPDS13:
I had mine cut down to 13.9" and pinned a flash hider. It shoots extremely smooth and handles very nice. Took it to 740 yards last weekend with some 75gr match ammo. D Wilson MFG did the work and it came out great.
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Did he have to mess with the gas port size or did leave it as is?
Link Posted: 3/5/2024 2:09:52 PM EDT
[#5]
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Originally Posted By JAG2955:
If you qualify to buy from Proven Outfitters, they have 14.5 SPEAR LT barrels.
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Can confirm, they show to have these in stock
Link Posted: 3/5/2024 7:34:45 PM EDT
[#6]
OP, FWIW, my 14.5" Virtus has a J03 valve and the 16" has a J04.
Link Posted: 3/6/2024 2:12:32 AM EDT
[#7]
Dave Wilson just chopped my little brother's 16 inch gun to 13.7 and pinned a brake on.

I'll get a chance to compare his 13.7 to my 11.5 inch spear shortly.  I'll report back.
Link Posted: 3/6/2024 3:45:54 PM EDT
[#8]
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Originally Posted By Kgknight1037:


Did he have to mess with the gas port size or did leave it as is?
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He left the gas port stock and just cut the barrel down. I have it on the minus gas setting shooting a Flow556k and it is extremely smooth.
Link Posted: 3/8/2024 4:48:38 PM EDT
[#9]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By JAG2955:
OP, FWIW, my 14.5" Virtus has a J03 valve and the 16" has a J04.
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My new 14.5" LT has a J03 as well, FYI.
Link Posted: 3/14/2024 12:06:40 AM EDT
[#10]
Sig Sauer MCX Gas Valve Assembly J04, 7.62x39mm 16" Barrel

I see that and then the J03 is 11.5" 7.62x39. Are these the same used on 5.56 variants?

Thanks
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