Not as shown in first picture- now without laser engraved slot refs for a cleaner look. (Slot ref models are still in stock and available upon request at no extra charge). This is the largest P90 siderail on the market and it weighs considerably less than those of other designs. Made of aluminium and cut to exact Mil-Std 1913 Picatinny specifications by a US Govt Contractor, these rails allow ample room for any tac-light or laser. This side rail fits on the P90 or PS90 USG by attaching to either side of the receiver using custom nylon risers and existing threaded holes. Rails have a matte anodized protective finish and nicely squared off corners. They have a large clearance on the underside to allow for the uneven shape of your receiver. Tested extensively. They are guaranteed to fit, hold a zero, and never break. Free Express Shipping!!!