We just got the Crosman M4-177 yesterday, and I gotta tell ya, it’s a lot of fun. While I wish it emulated more of the operation of real AR rifles, the sight picture and overall form factor are a pretty good match.
This thing has plenty of Picatinny rail real estate for clamping on goodies, and comes with some decent Picatinny-compatible iron sights. Overall quality is really good, in my opinion. When you pump it up (max 5 pumps, apparently), it doesn’t feel like a big hunk of plastic that’s been glued to a BB gun. It’s solid. It feels good in your hands, and has a good weight to it.
It’s fairly obvious that it’s a dressed-up version of an existing Crosman rifle design that probably dates back a couple of decades, but that’s not necessarily a bad thing. The guts of the thing are proven and have survived the test of time. Plus, they appear to have put a lot of thought and care into making it look and feel good. If you remember some of the industry’s past attempts at making AR-style air rifles (or even AR-style .22 rifles, for that matter), they were funky looking and embarrassing.
While I appreciate the decision to take a good BB gun and dress it up, I must say that I wish it had a few of the impressive AR-like features of their Stinger 34 airsoft rifle. The Stinger has a lot of good muscle-memory building features that fairly accurately mimic the operation of a real AR such as the charging handle, magazine release, and safety lever. The handguards can be removed just like the real thing.
Anyway, if you’re looking for a durable, fun BB/pellet gun that looks way cool and will at least give you some sight-picture training, grab the M4-177. It’s even available in pink!