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H&K LOWER ID GUIDE

by SAR Staff
July 24, 2022
in Articles, Articles by Issue, ID Guides, Search by Issue, V1N1 (Oct 1997), Volume 1
H&K LOWER ID GUIDE

New, Experimental extended safety lever.

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By Dan Shea

SAR is starting the “Identification Guides as a series”. We believe that these guides need to be done. We have plans to cover the HK internals, the Models of the Colt M16 series (YES, we do mean ALL of them) and various magazine identification. This is a photographic series.

Probably the most popular modern submachine gun is the HK MP5. This is a simple statement and the evidence makes it hard to refute. Elite military groups, law enforcement tactical teams, and civilian shooters all utilize the MP5, and it dominates the marketplace. The HK weapons are the subject of intense scrutiny by the users, and the modular concepts involved give rise to many variants. This can get confusing to the users and to the armorers.

We chose the HK trigger housings as a start, because there is so much confusion about them. The following photographic essay covers all of the variants that we are aware of as of August 1997. This was compiled with the help of Jim Schatz, from the Federal Operations Division of HK in Sterling Virginia, and he has our thanks once again.

The only variant that is missing is the early 3 shot burst group, which had the burst cam in the rear of the pack- we have one on the way as we go to press, and will try to do a comparison of the old and the new. (Well, it’s the only variant that we KNOW is missing).

We have covered every conceivable model of the West German manufactured HK guns. If you have any trigger housings that we may have missed, let us know and we will publish an update later in SAR.

Please send in your requests for us to design different Identification Series to SAR at 223 Sugar Hill Rd, Harmony, ME 04942 phone 207-683-2172, fax 207-683-2172, email at sareview@aol.com.

7.62 mm HK-91 semi-auto metal lower
7.62 mm HK G3 S-E-F (Safe, semi, full) This trigger housing is set up as a G3-SG-1 sniper group
9mm HK S-E-F housing (Safe, semi, full) Can also be used on the 5.56 cal. by changing the ejector. This is a swing down housing.
9mm HK MP5 “Navy” group, Safe, semi, full auto. Ambidextrous housing, can be used for the 5.56 mm by changing the ejector. This one has a selector extension.,
9mm HK MP5 2 rd burst group. Safe, Semi, 2 rd. Plastic ambidextrous housing. Can be used for 5.56mm by changing the ejector. Swing down housing.
9mm HK MP5-K Navy group. Safe, Semi, full auto. This is a swing down housing.
5.56mm HK33 0-1-25 housing. Safe, Semi, Full auto. Right hand only plastic housing.
-left- standard plastic lower- selector is only available on one side, and there is a thumb rest on the left side, with a finger guide on the right. Right- ambidextrous style lower has selector on each side, and the grip is smooth so as not to interfere with left or right handed shooters.
PSG1 trigger housing, with a crisp 3 lb. pull, adjustable trigger shoe, and an adjustable contoured grip. Semi automatic, clip on housing. 7.62mm
PSG1 in 5.56mm
5.56mm 4 position 3 round burst housing for the HK G41 rifle.
5.56mm “Mystery housing”. Swing down, S-E-F, plastic housing. Send in your guesses…..
Ejector difference in the MP5 40 cal and 10mm housings.
10mm / 40 cal MP5 “Navy” group, Safe, Semi, Full auto, plastic swing down housing, ambidextrous selector.
S_E_F lockout selector. The tool is placed in the spanner notches and the dial is rotated. When the single dot is lined up with the white index mark the firearm is in semi-auto only. When the 2 dots are lined up with the index mark the weapon is select fire. This does not work on burst guns.
New, Experimental extended safety lever.
7.62 mm HK G3 0-1-20 (Safe,semi,full)
9mm HK94 semi-auto. These 9mm housings can also be used on the 5.56 cal. by changing the ejector. This is a clip on the housing.
9mm HK MP5 4 position 3 round burst group. Ambidextrous housing. Can be used for 5.56 mm by changing the ejector. Swing down housing..
9mm HK MP5 3 round burst group. Safe, Semi, and 3 round. Plastic ambidextrous housing. Can be used for 5.56mm by changing the ejector. Swing down housing.
9mm HK SP89 semi-auto housing. This is a metal, clip on housing.
5.56mm HK93 sem auto housing- this is a clip on housing that can be used for 9mm by changing ejectors
5.56mm HK33 single fire group. This ambidextrous swing down lower can be used for 9mm as well by changing ejectors.
G3- SG1 set trigger housing for the SG1 tactical rifle. Note the “Set” trigger behind the standard main trigger. Activating the set makes the main trigger a sniper’s dream.
MSG90 sniper housing. Crisp 3 lb. Pull, adjustable trigger pull, swing down semi-automatic. 7.62mm
HK21E trigger housing. This will fit the HK21E, HK11E, HK23E and HK13E. It’s “Clip-on” characteristic is different from the semi autos in that it uses a full channel to attach into the rear of the magwell area. This is a 4 position 3 round burst with a full tang.
Note the “Hook” on the ejector of this two round burst 10mm group and the beveling on the side of the top of the trigger housing that is necessary for clearance of the bolt hold open device. Inset: left housing is 10mm/40 cal, right housing is 9mm.
9mm MP5 3 round burst housing for use by the Swiss or English.
10mm / 40 cal MP5 4 position 2 round burst group, swing down.
Note the “Hook” on the ejector of this two round burst 10mm group and the beveling on the side of the top of the trigger housing that is necessary for clearance of the bolt hold open device. Inset: left housing is 10mm/40 cal, right housing is 9mm.
Single fire unit for the burst mechanism. This will only work in the ambidextrous housing that has a burst maechanism, and will restrict the firearm to safe and semi-automatic.
Lock out device for S-E-F housings; consist of a special selector lever and a tool for adjustments.
Cap holder for the “navy group. This holds the cap while you are using the suppressor.
This article first appeared in Small Arms Review V1N1 (October 1997)

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    SAR Staff

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Tags: 1997Dan SheaGuideHKV1N1
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