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

Input:
Question: Will this fit the Gen. 3 Glock 19 with serial # beginning with the letter V?
Document: Was hesitant to order for my Glock 21 because it is not mentioned in advertisement. I'm happy to report that this will fit gen 3 model 21's and it installed in minutes. Glock hump issue resolved......I'm off to the range;)
Very affordable mod for glock (gen 1.2.3, not for gen 4), really encrease the grip on my pistol (G19). very recommended for who, like me, has small to  medium hands.
If you own a Glock pistol, this is a must-have product. I own five gen-3 Glock pistols (ooops, hope Barry O doesn't see this! ): G17, G20, G21, G29 and G30 and I have installed a Grip Force beaver-tail grip adapter on each one. The adapters were easily installed in each case except for the G20 and G21.
I own a G27 gen 3 subcompact and my wife owns a G19 gen 1 compact frame Glock. I had seen these and considered getting them for a while because I have painful memories of finding a gaping hole chewed through the skin on my thumb knuckle by the corner of the backstrap on my G27 after a session of shooting. I really didn't want to wear shooting gloves for a variety of reasons, and I even resorted to putting a piece of duct tape on my knuckle to shield it from the abrasion.
Nice concept - but is about 1/64th of an inch to narrow for fitting on a generation 3 glock pistol. I had to use a butane lighter and a steel punch to heat up and stretch the adapter and pin hole openings to get it to bearly fit on my Glock pistol. Grip Force definetly needs to re-engineer their Glock grip adapter to make absolutely certain it will fit any Glock pistol without modifications. Im glad I only wasted $26.00 on buying this product.
Purchased & installed on a G17 Gen 3. I have NOT went to the range & spent time with it yet, I just wanted to voice my concerns at how much of a pain in the ass installation is. Thank god they give you 4 spare plastic frame pins, otherwise installation would be no-go. There is an &#34;easy&#34; install guide trick someone posted on YouTube that helped me out: Wrap the frame with paracord, shoe string, or something else.
First off great price for these. Installed with absolutely no problem. I had a problem before of bringing My Gen 2 19 up quickly and my sight picture always being a little high. This amazing enough corrected that. I installed the smooth adapter and noticed it bowed out a little bit at the top. I took it back off and gently filed down where it contacts at the rear of the slide. It layed down alot closer after that.
No problems.Coming from 15+ years shooting a custom Springfield 1911A1 that started as a Mil Spec model, my muscle memory had me pointing Glocks high, the Grip Force Adapter helped me with presentation.4 stars because I wish the Gen 123 SC would fit the larger framed Glocks.
Purchased in September 2013. Came with two adapters, Gen 123 SC and Gen 123. I used the SC (smooth contour) on my Gen 2 G19 and the standard Gen 123 on my Glock 21 SF (with modification...had to heat it with a heat gun for a minute and bend it out to make up for the short frame). According to the Grip Force Adapter website, I believe the SC version is for compact (and sub-compact) Glocks.It came with 4 pins.
Item arrived quickly. Took a bit of sanding on the surface that contacts with the Glock but once I got it to fit. Perfect match for my Glock.
Answer: yes