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9/22/2017 12:11:25 AM
Posted: 10/29/2003 6:40:18 AM EDT
Getting ready to put together my first AR. I'm trying to decide between a 16" M4 upper from J&T or the 14.5" Gov't Profile upper from Cav Arms, both with a 1/9 twist, or building an upper using a Bushmaster 14.5" 1/7 twist barrel.

The carbine will be used for general plinking and maybe some 3 gun matches.

What would be the best way to go and why?

Thanks!


Link Posted: 10/29/2003 7:40:34 AM EDT
[Last Edit: 10/29/2003 7:42:25 AM EDT by wyv3rn]
Personally I wouldn't go with anything less than a 1/8 (no 1/9 - 1/12) twist. I like the ability to shoot the heavier bullets.
Link Posted: 10/29/2003 7:58:32 AM EDT
The only reasons to buy a 14.5" is if you want to mount a bayonet or maintain the "milspec" look. You still have to permanently attach a muzzle device to bring the OAL to 16" and that complicates maintenance and repair down the line. The twist is your call, depends on what length bullets you want to shoot. Of the three parts houses you listed I'd go with BFI.
Link Posted: 10/29/2003 8:21:58 AM EDT
Link Posted: 10/29/2003 8:26:25 AM EDT
[Last Edit: 10/29/2003 8:28:27 AM EDT by DevL]
If its going to be preban configuration I would go Bushmaster 14.5" 1/7 It it will be post ban I would go with a full 16" barrel, prbably still Bushmaster. You do know that you can buy a $100 complete upper reciever from the EE and mail it to Bushmaster when you buy the barrel and they will put the barrel on your upper free of charge right? Thats under $300 for a brand new factory assembled Bushmaster upper (minus guts). Then someone has complete bolt/boltcarrier factory COLT sets for under $100. I wish I could remember who that was...
Link Posted: 10/29/2003 8:35:58 AM EDT
[Last Edit: 10/29/2003 8:48:50 AM EDT by giffmann]
DevL, I was not aware that Bushmaster would install a barrel free of charge. Any idea what sort of turnaround time on something like that? Also, why the difference for pre or post ban? Part of my thinking was that if I picked up the 14.5" barrel, if the ban sunsets next September I could add a Vortex of Phantom flash hider to the barrel.
Link Posted: 10/29/2003 9:05:26 AM EDT
Link Posted: 10/29/2003 10:10:08 AM EDT
Originally Posted By giffmann: Getting ready to put together my first AR. I'm trying to decide between a 16" M4 upper from J&T or the 14.5" Gov't Profile upper from Cav Arms, both with a 1/9 twist, or building an upper using a Bushmaster 14.5" 1/7 twist barrel.
View Quote
1:9 twist is a good alternative since it will handle the 55gr or the 62gr. of course if you decide to shoot anything heavier the 1:8 twist is the best for heavy weight 77gr type of bullet. but how often do you shoot the 77gr, so the 1:9 is a good alternative in my opinion.
Originally Posted By giffmann: The carbine will be used for general plinking and maybe some 3 gun matches.
View Quote
For what you ask, the 16 inch is a good length but the extra 1 1/2 inch in barrel length is not that big of a deal. Tweak has a good point, it all depends on future maintance or repair or even upgrades. I shoot 55gr at local 3gun match with lots of success. I would go with a Bushmaster 16inch flat top upper in either 1:9 or 1:7 twist
Link Posted: 10/29/2003 11:35:11 AM EDT
Link Posted: 10/29/2003 12:19:06 PM EDT
Originally Posted By SMGLee:
Originally Posted By giffmann: Getting ready to put together my first AR. I'm trying to decide between a 16" M4 upper from J&T or the 14.5" Gov't Profile upper from Cav Arms, both with a 1/9 twist, or building an upper using a Bushmaster 14.5" 1/7 twist barrel.
View Quote
1:9 twist is a good alternative since it will handle the 55gr or the 62gr. of course if you decide to shoot anything heavier the 1:8 twist is the best for heavy weight 77gr type of bullet. but how often do you shoot the 77gr, so the 1:9 is a good alternative in my opinion.
Originally Posted By giffmann: The carbine will be used for general plinking and maybe some 3 gun matches.
View Quote
For what you ask, the 16 inch is a good length but the extra 1 1/2 inch in barrel length is not that big of a deal. Tweak has a good point, it all depends on future maintance or repair or even upgrades. I shoot 55gr at local 3gun match with lots of success. I would go with a Bushmaster 16inch flat top upper in either 1:9 or 1:7 twist
View Quote
I agree with this! It would be my choice if I were you. a 1/9 twist can stabilize some of the heavier stuff. Even the 75 gr. shoots well in some bbl.s Problem is you won't know if it will till you shoot it.
Link Posted: 10/29/2003 12:53:28 PM EDT
Troy, the Bushy 1/9 14.5" barrels that we use reliably stabilize the 73 grain Bergers out to at least 100M... While the fragmentation isn't quite as good as the 77 OTMs, it's a sight ahead of M193. -Cpa'n
Link Posted: 10/29/2003 1:35:55 PM EDT
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