AR Sponsor
Posted: 9/13/2007 4:29:16 AM EDT
|
What would be the Pro's and Con's of going with an M 16 bolt carrier group over an AR15 bolt carrier group if I were building a "long range" rifle? I have already assembled an upper and complete lower (both MEGA) and am pleased with what I see so far, but I am a bit uncertain as to if the heavier M16 bolt assy. will provide any benefit over the lighter AR 15 assy. The rifle will most likely be in 6.8 SPC, but that isn't set in stone yet either. The barrel will be 22" to 24" with a free floating fore end. Suggestions or comments? |
|
No pros or cons IMO with regard to BCG questions as the carrier chosen will have little effect either way, although I suspect you have not fully read the 6.8mm FAQ tacked to the top of the AR Variants forum for the 6.8mm and "long-range" really do not belong together. The 6.8mm round will not be much good at long range for I suspect that the most accurate 6.8mm rifle made would come in sucking hind tip to my CR6724 pitching 77grn SMKs at any distance past 400 yards. The 6.5mm Grendal would be a much better long range bullet choice. mike |
| Many people use the M16 carrier because of the added weight and shrouded firing pin. The extra weight helps slow down the carrier speed a little bit. That can sometimes be helpful in the CAR length gas system if your bolt is moving too fast. Mine was, and was ripping through the rims of certain brands of brass even though I was using an H-buffer. I put in the M16 BCG and it's been 100% ever since. If you're running a rifle length gas system it shouldn't make a tremendous difference. MJD |
|
At most you are looking at a bit over 1/2 oz difference in weight. As was already stated, most folks who opt for an M16 carrier over an AR are using it for full autos or carbines to help slow down the cycling of the action. Not much differnce for a rifle length build that will be "slow fired". You can get an Enhanced AR Carrier that has a shrouded firing pin to save battering of the firing pin. Weights of complete Bolt Carrier Groups: AR-15 - 10.9 oz AR-15 - with firing pin shroud - 11.3oz M-16 - 11.5 oz.  Edit to add amplifying info/pic |
AR Sponsor