After converting one of my AR uppers to side charging I got to thinking about the design and how easy it would be to use it as a straight pull bolt action. So I designed it. Here is my idea for a straight pull bolt action that would use standard AR-15 barrel extensions and bolts with a modified carrier.
Standard AR-15 barrel assemblies could be used if a sleeve is placed over the gas port and locktite'd to seal it. Ill chamber and assemble this barrel the same as any other AR barrel just omit the gas port.
The upper is 1.375" 7075 Aluminum Hex bar 6.375" long. The lower assembly is 1.125" x ~2.8" 6061 Aluminum stock.
It will use standard AR-15 lower parts(trigger, hammer, springs, etc..). The carrier is a standard AR-15 carrier shortened to 3" and the key is replaced by a square block for alignment in the upper.
The bolt is off the shelf stock. The handguard and barrel nut are very simple and similar to regular AR free float tubes. Im retaining the buffer tube mostly for the benefit of allowing the use of the Magpul PRS stock. It will have a spring and elongated buffer in the tube though to force the carrier assembly home to seat rounds with a similar pressure.
I am working on redesigning the gun to make it a bullpup style gun. My hang up with that is the same as every bullpup, the trigger mechanism. I am still working on that and hopefully can get it figured out. Input here would be very welcome.
The only think I havent decided how to do on this is a bolt hold open. I dont want to use the standard bolt catch but Im drawing a blank on what else to do. Inputs in this area would be greatly appreciated.
Pricing out the cost of the raw material for this, not including the barrel blank, and it is approximately $65.
Here are my 3D renderings of the design. Each part is made a different color to allow differentiation amongst the parts.
Note: many dimensions are not exact due to me doing the individual parts while not being near an AR to take measurements.
Standard AR-15 barrel assemblies could be used if a sleeve is placed over the gas port and locktite'd to seal it. Ill chamber and assemble this barrel the same as any other AR barrel just omit the gas port.
The upper is 1.375" 7075 Aluminum Hex bar 6.375" long. The lower assembly is 1.125" x ~2.8" 6061 Aluminum stock.
It will use standard AR-15 lower parts(trigger, hammer, springs, etc..). The carrier is a standard AR-15 carrier shortened to 3" and the key is replaced by a square block for alignment in the upper.
The bolt is off the shelf stock. The handguard and barrel nut are very simple and similar to regular AR free float tubes. Im retaining the buffer tube mostly for the benefit of allowing the use of the Magpul PRS stock. It will have a spring and elongated buffer in the tube though to force the carrier assembly home to seat rounds with a similar pressure.
I am working on redesigning the gun to make it a bullpup style gun. My hang up with that is the same as every bullpup, the trigger mechanism. I am still working on that and hopefully can get it figured out. Input here would be very welcome.
The only think I havent decided how to do on this is a bolt hold open. I dont want to use the standard bolt catch but Im drawing a blank on what else to do. Inputs in this area would be greatly appreciated.
Pricing out the cost of the raw material for this, not including the barrel blank, and it is approximately $65.
Here are my 3D renderings of the design. Each part is made a different color to allow differentiation amongst the parts.
Note: many dimensions are not exact due to me doing the individual parts while not being near an AR to take measurements.
