Excellent for the money - AIM Sports Inc M-Lok Handgaurd for H&K 91

I replaced the stock "wide" handguard on my HK93K/HK33K clone with this, and it's a great upgrade. It locks up nice and tight, feels sturdy, looks good, and works with a left-handed charging handle. Other aluminum handguards have additional rail space on the right side that would interfere with that setup, so I was pleased to find this one. It's easy to recommend, especially at <$50.

Other notes:

-The picture makes it look like the handguard has a flat bottom, but that's an optical illusion. It's round/octagonal.

-The machining is overall good (no tooling marks I can see), but some edges are a little sharp. It's not like they're going to cut you, but they probably should have been a little more rounded/chamfered. This is especially nitpicky since just about everywhere you'd naturally put your hands is smooth- if you're not a metalworker, you might not even notice.

-Despite the light weight, the handguard feels sturdy. I don't feel any flex when it's in use, nor when holding it in my hand and squeezing hard. Definitely no feeling of flimsiness.

-I haven't tried to actually attach anything to the MLOK slots, so I can't comment on the functionality of those.

-I'm hesitant to even mention this since it's very likely my fault, but I had to do some minor fitting to make this handguard fit. The hole to secure it was too far towards the muzzle to match up with the hanger on my rifle (by maybe 1mm). Long story short, this is a home-built rifle and I probably welded the hanger in the wrong spot, and not a problem with this handguard. Near as I can measure the mounting hole on this handguard is 226mm (maybe 225.5mm) from the front of the trunnion, if that helps. Alternately, if you have a "wide" handguard and can push it back on the rifle so that the mounting hole is closer to the receiver than the hanger (ie, misaligned and "too short"), this handguard will very likely fit your rifle fine.