The patent pendingUDC (Ultimate Dust Cover) is the easiest to install, best sealing , lightest and quietest port door cover available! The SI AR-UDC-E is the first quick disconnect ejection port cover featuring an internal lip which provides a better seal against the elements (True Seal Technology). It is constructed out of a high density polymer material making it more durable and functional than the traditional dust covers. The uniqueinternal detent rod design enables users to attach and detach the cover in 5 to 10 seconds with ease. Features an adjustable detent set screw in order to compensate wear on the receiver and increase or decrease opening power.There are multiple designs to choose from to customize your AR!
– 1x Dust Cover
– 1x Spring
– 1x Pin
– Patent pending spring-loaded, internal detent rod for easy installation and take-down.
– Constructed with light-weight durable polymer material
– Will never corrode rust or fade
– Will never deform or get bent out of shape
– Comes in a variety of designs
– Patent pending, True Seal, internal lip that seals the port tighter than traditional dust cover designs.
– Built-in adjustable detent set screw to compensate for wear on receiver.
-Available for AR-15 and AR-10
for the AR-10 308
The SI UDC has been tested and fits on Mega Arms MATEN, DPMS Oracle, SIG 716, YHM, and SW perfectly. It is easily modified to fit other receivers with light sanding.