Can I put a different caliber upper on my AR?
One of the limitations for caliber swaps is the length of the standard magazine and magazine well. The neatest and spiffiest thing about AR-type rifles is that they’re not really just a single rifle type. Of course, you can’t just put any caliber upper on a standard lower.
What caliber AR-15 should I get?
If you want a jack-of-all-trades rifle, the standard AR-15 in 5.56 will get the job done. If you’re looking for either a DMR or a long-distance precision rifle, 6.5 Grendel is hard to beat. 5.56 will work as an alternative for your DMR; . 308 would do for longer range engagements, but requires a dedicated lower.
Can you mix and match AR-15 uppers and lowers?
No, combining upper and lower receivers of different brands will make no difference in accuracy whatsoever. On the other hand, the quality of your upper receiver certainly will.
What calibers can a AR-15 lower use?
The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the . 223 Remington. Because of the pressures associated with the 5.56x45mm, it is not advisable to fire 5.56x45mm rounds in an AR-15 marked as .
Do polymer lowers break?
These lowers are weaker than forged, but the difference is minimal. You aren’t going to break a billeted lower with normal use. Take a sledge hammer to both of them and there may be an undetectable difference in the force it takes to break one.
How durable are polymer AR lowers?
The Durability Issue The biggest question people have with polymer AR lowers isn’t usually the fit of the product, it’s the durability. If a polymer lower was going to fail, it would be there. While the recoil of a . 223 Rem/5.56 NATO is minimal, that part of the lower still bears a significant physical load.
What is the best caliber for AR 15?
9mm is the most popular centerfire pistol round, and it’s an excellent round for the AR-15. A 9mm AR doesn’t run off the same gas system as a 5.56 and is a blowback style weapon.
What calibers can fit AR 15?
Common Calibers. If you do a little research, there are a few common calibers that you can build an AR-15 in. Some of these are: .223/5.56x45mm, .300 Blackout, 6.5 Grendel, .458 SOCOM, .50 Beowulf, 6.8 Remington, and .22LR.
Who makes the best AR 15 rifle?
Rock River Arms makes some of the best AR-15 rifles in the world. After exhaustive testing, both the FBI and DEA turned to Rock River Arms for their patrol rifle contracts.
What is the best AR 15 ammo?
Here’s the best AR-15 ammo: American Eagle XM193 American Eagle XM855 PMC Bronze .223 Wolf Gold .223 Federal Gold Medal Federal LE Hi-Shok Speer Gold Dot Duty