AR Sponsor
Posted: 10/13/2014 1:14:17 PM EDT
| Does a .308AR use a standard AR bolt carrier with a .308 bolt or is the whole group specific to AR10/SR25/DPMS? |
|
Quoted:
Does a .308AR use a standard AR bolt carrier with a .308 bolt or is the whole group specific to AR10/SR25/DPMS? The original Armalite AR10's used a much larger BCG The KAC SR25 and Eagle Arms AR10 in the 1990's set a new trend for an AR10 carrier that would be compatible with AR15 receiver extension tubes. 
DPMS used the KAC design, and it became the most prominent. They all are much larger than an AR15 BCG. 
|
|
Quoted:
so with the 308 bolts now offered by most companies I can just use a regular ar15 buffer tube? Yes, all the current AR15 Receiver Extension Internal Diameters are what the 1990's AR10's are meant to function in. Some companies have different lengths for their RE Tubes, so you need to take that and your buffer length into consideration, along with the recoil spring length. New Armalite (Eagle Arms) carbines use a mid length RE tube that is slightly longer than an AR15 carbine RE. We're talking 7.25" vs. 7.625" Buffers are NOT interchangeable between the two. DPMS uses a standard AR15 RE tube with very short little AR10 carbine buffers, like Knight's did with the SR25K. You can choose which length you want to use for a carbine AR10, but you then need to make sure that you match the correct buffer and spring with it. This is where we commonly see a lot of problems in the AR10 DIY world. |
|
Quoted:
Yes, all the current AR15 Receiver Extension Internal Diameters are what the 1990's AR10's are meant to function in. Some companies have different lengths for their RE Tubes, so you need to take that and your buffer length into consideration, along with the recoil spring length. New Armalite (Eagle Arms) carbines use a mid length RE tube that is slightly longer than an AR15 carbine RE. We're talking 7.25" vs. 7.625" Buffers are NOT interchangeable between the two. DPMS uses a standard AR15 RE tube with very short little AR10 carbine buffers, like Knight's did with the SR25K. You can choose which length you want to use for a carbine AR10, but you then need to make sure that you match the correct buffer and spring with it. This is where we commonly see a lot of problems in the AR10 DIY world. Quoted:
Quoted:
so with the 308 bolts now offered by most companies I can just use a regular ar15 buffer tube? Yes, all the current AR15 Receiver Extension Internal Diameters are what the 1990's AR10's are meant to function in. Some companies have different lengths for their RE Tubes, so you need to take that and your buffer length into consideration, along with the recoil spring length. New Armalite (Eagle Arms) carbines use a mid length RE tube that is slightly longer than an AR15 carbine RE. We're talking 7.25" vs. 7.625" Buffers are NOT interchangeable between the two. DPMS uses a standard AR15 RE tube with very short little AR10 carbine buffers, like Knight's did with the SR25K. You can choose which length you want to use for a carbine AR10, but you then need to make sure that you match the correct buffer and spring with it. This is where we commonly see a lot of problems in the AR10 DIY world. I was thinking of using a standard ar15 RE tube and a JP silent capture spring. Barrel will be a 16 or 14.5 midlength Will this work? |
|
Yes, the JP SCS will work following their guidelines:
Compatibility
The JPSCS-AR10 is designed to work in standard 7-inch M16/M4-length buffer extension tubes on .308 AR-type rifles like the DPMS LR-308. Armalite .308 rifles, likewise, use these standard M16 extension tubes with rifle-length stocks, so the JPSCS-AR10 will function normally when installed with the supplied spacer. However, Armalite’s .308 carbines use a slightly longer, nonstandard carbine extension tube. The JPSCS-AR10 can still be used with these extension tubes by installing the spacer, which must be modified to fit. Alternately, the system will function readily if the longer Armalite carbine tube is replaced with a standard 7-inch .223 carbine extension tube. The JPSCS-AR10 is not compatible with the HK MR762, the Sig Sauer 716, or the Rock River Arms LAR-8 because of its longer bolt stroke and subsequently longer extension tube. From JP/Horse's Mouth |
AR Sponsor