Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: I'm looking to purchase a Blackhawk Serpa CQC for my Glock 21 sf. What models will fit?
Document: I bought this cause i was sick of inside the waist band holster and im so glad i got this for my Glock 21 i should of got one sooner.Fits great no compaints what so ever.
This is exactly what I was looking for to fit my older Ruger P85 9mm! It locks my gun securely into place and is easily drawn.
Normal Blackhawk quality and fit. Solid lock. Locking tab can be removed if you don't like the locking aspect of this holster. Some do some don't. Easy to modify.
Perfect fit, secure design, really like the finger release latch. Very adaptable to any method you should choose for your carry method. Based upon this unit would purchase again for this or another specific fit pistol.
I have several pistols but my favorite is the Ruger p89, 9mm. I have had it for a long time and it has never jammed or given any problems. I have been looking for a real holster (not a cheap one) for some time now. I finally decided to get the Blackhawk and I wish I had sooner. This is the real deal and it's really not that expensive for a fire arm accessory. The p89 fits perfectly!
Best brand of holster you can buy out there! There's a reason why most police use Blackhawk. They are Custim fit and made to fit your gun. And thanks Blackhawk for making one for my older style of gun! !
Very good holster for both concealed & open carry. No problems with fit or draw using the Glock 20 with a 6&#34; barrel & Advantage sights. I would recommend it with no problems.
This is a great light weight holster that can easily be found quite a bit under msrp if you shop around. It comes with paddle holster and belt slide attachments. they are easily change via a few screws. You can also order a seperate molle attachment if you want to put the SERPA on your vest, likelwise it is easily moved to that attachement. I have a glock 30 I use with the belt slide and the glock 21 holster I am reviewing here, I use on a molle vest.
The fit is excellent, the release is well placed and drawing is smooth, and the ability to fine adjust and fine tune the cant is wonderful. Had read that these molded plastic holsters can be hard on the finish, but so far no problems. (But, I'm not law enforcement and don't use it daily; and have only worn it a half-dozen times or so.) When I have worn it, it is pretty comfortable.
This is the best of both worlds! Postive gun retention with super easy release.Im very happy with this purchase.
Answer: yes