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1/25/2018 7:38:29 AM
Posted: 6/21/2001 2:25:34 AM EST
I have a Colt AR15 SP1 that I bought back in 1979. I plan to buy the preban Bushmaster upper that has the 11.5" barrel and 5.5" flash supressor. If I do this, am I giving up too much velocity and accuracy? I think that I will mainly be shooting at 100 yds but I would still like to hit targets at 200 yds if needed. I also plan to get a telescoping stock for it. Some people have mentioned that their rifle was less reliable after swapping in a telescoping stock. Is this something that I should be concerned about?
Link Posted: 6/21/2001 2:32:23 AM EST
If you aren't buildin' an SBR why get an 11.5 inch barrel when you need a 16" overall barrel lenght? Why not get a 16" barrel with a flash suppresor? Or a 14.5 inch barrel with a flash supresor of at leat 1.5" permanantley affixed? The velocity rule of thumb is appx 30 fps per inch IIRC. So you are losing 165 fps, appx.
Link Posted: 6/21/2001 3:02:57 AM EST
11.5"barrel plus 5.5" FH is a perfectly legal upper to have on your preban as long as the flash hider is permanently attached.mmk
Link Posted: 6/21/2001 3:05:49 AM EST
MMK, I assumed he knew that and was staying legal. But why if you need 16" of barrel/perm flash supp, not get the most barrel out of that combo as possible? That was my point.
Link Posted: 6/21/2001 3:17:11 AM EST
Legally, you could have a 5" barrel with an 11" flash suppressor permanently affixed. Whoo-hoo! You'd have the "coolness" of a really big flash suppressor with the hard-hitting ballistics of a .22 Magnum. [rolleyes] The barrel is the heart of the rifle. I'd keep it at least M4 length (14.5").
Link Posted: 6/21/2001 4:18:00 AM EST
Kin, you should be just fine. This is not an unusual combination. At 100 yards, you'll never notice the difference. The shorter sight radius will have the most effect. Norm
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