When it comes to non-light bearing IWB holsters, we always recommend a holster made for the fullsize version of a gun for use with a compact gun (assuming the frame/slide profile is the same) as the extra length aids in concealment. If the holster is made for the shorter compact version of a gun, the grip of the gun above the belt line tends to tilt out away from your body which makes the gun print more when concealed. The additional length of a fullsize holster helps to minimize the gun from tilting out above the belt line. If you prefer the holster to only be as long as the frame/slide of the gun, then we recommend having us install a comfort puck to the back of the holster to help with minimizing the tilting.
A 3.9" Staccato C2 in a holster for a 4.25" 2011 Commander
A CZ P-07 in a holster for a CZ P-09
A Glock 19 in a holster for a Glock 17
With subcompact guns like the Glock 43 or Sig P365, we will use the longer version of the gun as the mold (i.e. Glock 48 or Sig P365XL) as well as install a comfort puck to minimize the smaller gun from tilting out above the belt line.
If a longer version of a subcompact gun doesn't exist (i.e. Springfield Hellcat), then we will artificially add an extra 1/2" inch or so to the slide/frame profile of the mold.
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