Mr Wolverine
CGN Regular
- Location
- Manitoba. Canada
New XCR-L bolt assembly.
Please refer to the attached image of the parts. You will notice that they are very much like the current XCR-M parts: The firing pin is held in the carrier rather than in the bolt. Also, the recoil buffer is held in the carrier and is made of a much stronger material. The bolt is shorter. These parts assemble just like the XCR-M parts.
Caliber changes are made just like the previous L models but one must also change the firing pin module. The bolts and firing pin modules are marked for caliber. The 5.56 one will work with 5.56, 6.8, and .300 BLK. The 7.62 one will work with 7.62x39mm and 5.45x39
Older barrels, extractors, oprods, ejectors, upper receivers work with these new parts. However, for lowers to work, there must be a small modification. Please refer to the other attached picture. After the lower is modified by machining a clearance at the rear for the new buffer only new style bolts must be used as the old style buffer will no long work.
Quote “Rob Arms” - We would have preferred to not make any changes to the lower receiver. However, the change was mandatory and is not hard to make. We will provide drawings and/or a template that can be used to make the modification
Caution, when selling/purchasing caliber conversion kits you must insure that the “long” bolt goes with the old style carrier and the “short” bolt with the new style carrier. The bolt carrier must match the lower.
On the left is the “old” style lower showing the old style bolt buffer in place. On the right is the modified lower for use with the “new” style bolt which has the buffer attached to the carrier.
Please refer to the attached image of the parts. You will notice that they are very much like the current XCR-M parts: The firing pin is held in the carrier rather than in the bolt. Also, the recoil buffer is held in the carrier and is made of a much stronger material. The bolt is shorter. These parts assemble just like the XCR-M parts.
Caliber changes are made just like the previous L models but one must also change the firing pin module. The bolts and firing pin modules are marked for caliber. The 5.56 one will work with 5.56, 6.8, and .300 BLK. The 7.62 one will work with 7.62x39mm and 5.45x39
Older barrels, extractors, oprods, ejectors, upper receivers work with these new parts. However, for lowers to work, there must be a small modification. Please refer to the other attached picture. After the lower is modified by machining a clearance at the rear for the new buffer only new style bolts must be used as the old style buffer will no long work.
Quote “Rob Arms” - We would have preferred to not make any changes to the lower receiver. However, the change was mandatory and is not hard to make. We will provide drawings and/or a template that can be used to make the modification
Caution, when selling/purchasing caliber conversion kits you must insure that the “long” bolt goes with the old style carrier and the “short” bolt with the new style carrier. The bolt carrier must match the lower.
On the left is the “old” style lower showing the old style bolt buffer in place. On the right is the modified lower for use with the “new” style bolt which has the buffer attached to the carrier.
