Start this section with an interesting entry to the piston arean... PWS Primary Weapons systems has a new entry that are very interesting to me. I will be taking one out for a test drive in a short awhile.
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-011.jpg)
this sytem interest me in several reasons. one, it is low profile enough to be compatible with some rail system right off the bat. the excellent Daniel Defense system is one of them. no modification are required to the rail.
the system are front loading so you can retrive all piston components for cleaning without removing the rail.
the gas adjustment in the front offer a few positions that can be used in various operaion requirement. you can shut off the gas and turn this into a bolt gun for covert sniping.
the system is high quality with a reasonable price, with the DD rail, this conversion is approximate 300.00 or more less then the competition.
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-012.jpg)
the stainless gas knob will be finished in production version to be less refective.
is it just beautiful?
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-013.jpg)
the bleed off or the gas vents are behind the gas regulator. as you can see from some of the vent holes on the rail system, the gas regulator is working quit well.
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-014.jpg)
The breakdown view of the gas piston assembly.
the gas key are modified direct gas key with a embedded stake inside to keep it from breaking apart from the punishing piston strikes.
the long rod are inside a protective tubing which has some vent holes underneath to help clear any dirt or grind.
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-081.jpg)
HK 21E at RDTS booth. two availabel to cut down and build into a HK 91 receiver for a semi sear ready civilian legal 21E.
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-082.jpg)
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-086.jpg)
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-080.jpg)
RDTS's 21UBF, this got to be a fun blaster
![](http://photos.imageevent.com/smglee/cltactical/huge/SAR07-079.jpg)