I picked up a brand new Kel-Tec RDB off gunbroker last week for slightly under MSRP. For those not familiar this is a 5.56/.223 semiauto bullpup with downward ejection like a PS-90, and accepts standard AR-15 magazines. Haven't had a chance to take it to the range yet but I'll get it there this week. It's simple to take apart and easier to clean than an AR-15, but not as easy as the RFB (K-T's other bullpup rifle). I moved the charging handle to the right side as I am a lefty but you can see it in on the left side in the pictures. It lies flush underneath the forward section of the upper rail and swivels out like a G36 for use. When pulled back you can lock it by swiveling it upwards slightly like a MP5.
I attached a Vortex Spitfire 3x to it and encountered my first "issue": there is very little gap between the mounting bracket's nuts and the charging handle when fully pulled back. Specifically, my thumb does not fit and did not appreciate the attempt. I may turn the base backwards which would move the screws to the other side, but I think in practice I will end up using the charging handle with my hand underneath it rather than on top which will eliminate the issue.
Other observations: While it doesn't have a swivel stud underneath the buttstock for a sling like an AR-15, there are still 7 sling attachment points built in, 2 of which swivel freely. The plastic covering over the rear of the stock duplicates the effect of aftermarket kydex cheek covers common on RFBs and KSGs.
I attached a Vortex Spitfire 3x to it and encountered my first "issue": there is very little gap between the mounting bracket's nuts and the charging handle when fully pulled back. Specifically, my thumb does not fit and did not appreciate the attempt. I may turn the base backwards which would move the screws to the other side, but I think in practice I will end up using the charging handle with my hand underneath it rather than on top which will eliminate the issue.
Other observations: While it doesn't have a swivel stud underneath the buttstock for a sling like an AR-15, there are still 7 sling attachment points built in, 2 of which swivel freely. The plastic covering over the rear of the stock duplicates the effect of aftermarket kydex cheek covers common on RFBs and KSGs.
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