WSSM Upper Conversion
The basic custom upper conversion features a Shilen match stainless barrel with my ventilated, three-piece hand-guard. It also features a picatinny gas-block, and flat-top upper receiver with forward assist. Each upper comes complete with bolt/carrier, charging handle and magazine.  These uppers can be used with any, un-modified, mil-spec lower receiver.  You can switch from .223 Rem. to .25 WSSM in 20 seconds!  I am now using the Magpul anti-tilt followers as a standard feature in all of my WSSM magazines.  By using these followers, I have increased the reliable capacity of the magazine and enhanced the reliability of the upper.

...more on WSSM

Dtech Float Tube
New for 2011, my new free-float tube is finally finished.  Over the last 18 years of working with, and building uppers, I have gotten increasingly disappointed with the commercially available float-tubes on the market.  Most are of the two-piece design that forces you to accept whatever torque you end up with when the barrel-nut is correctly timed-up to the receiver.  My new float-tube has a two-piece barrel-nut that allows you to get perfect alignment for the gas-tube, without respect to torque.  This also allows you to have the vents and sling-stud always time-up perfectly.  The float-tube can be installed. removed and reinstalled as many times as you wish, and you will never have to worry about your sling-stud ending up anywhere but bottom-dead-center!