CHARLES B CASSELS
Medical Practice at Ponce St, New Smyrna, FL

2011009, Apr 28, 2011

Oct 21, 2010

12/909278

Charles B. Cassels - New Smyrna Beach FL, US

F41A 5/18

8919101

A convertible gas piston conversion system for the AR-15, AR-10, or their variant rifle platforms is provided to convert the platform from a direct impingement gas system to a piston driven operating system. The conversion system includes a gas block having a barrel bore and two piston cylinder bores one on either side of the gas block. One of the piston cylinder bores is for utilization of the AR-15 rifle and the other of the piston cylinder bores is for utilization of the AR-10 rifle, making this piston system convertible for either the AR-15, AR-10, or any of their variant rifle platforms. A piston cylinder is inserted into the gas block via the piston cylinder bore and a piston is actuated inside the piston cylinder to cycle the rifle. A connecting link is coupled between the piston and an op-rod making the gas systems length adjustable by simply replacing the connecting link. The op-rod acts directly upon a carrier lug to cycle the rifle and a compression spring or the like returns the piston back into the battery within the piston cylinder. An op-rod bushing guides the op-rod throughout travel. A bolt carrier includes a lug and an anti tilt/anti wear device. The bolt carrier provides a lug for the op-rod to impinge upon to cycle the rifle. The anti tilt/anti wear bolt carrier device installs into the rear of the bolt carrier to minimize damage and wear to the buffer tube and upper receiver from a condition identified as carrier tilt.

2013005, Mar 7, 2013

Sep 1, 2011

13/223985

Charles B. Cassels - New Smyrna Beach FL, US

F41A 5/28

89193

A multi use retro fit capable adjustable gas block designed to interface with an autoloading gas operated firearm is provided to replace existing gas blocks. The adjustable gas block optimizes gas flow into the host firearms operating system. The adjustable gas block has a spring loaded adjustment knob that releases when pulled forward allowing it to rotate. By rotating the adjustment knob the gas flow is increased or decreased based on one of four provided gas settings. Setting one is optimal for using a silencer, setting two is optimal for normal operations, setting three is optimal for adverse conditions, and setting four either turns the gas flow off optimizing sound reduction and providing for manual operation, or provides an extra high gas setting for the host firearm. The system works by precisely metering gas entering the operating system and not by exhausting excess gas into the atmosphere. The adjustable gas regulator may be configured with a piston operating system or a direct gas impingement operating system, e.g. gas tube, as is the case with the standard AR-15/AR-10 family of firearms.