H&R 300 AAC Blackout Handi-Rifle Review
Part 5 - Internal Features
May 4, 2013

So far I have covered in detail the external and operational features along with disassembly of the H&R 300 AAC Blackout Handi-Rifle.  In this part of the review, I show many photos allowing you to get a good look at the internal features of this rifle.  As always, you can click on a photo to bring up a higher resolution image allowing you to see the finer details in the photos.

 

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Barrel Assembly

The phosphate finished barrel measured 16.31" and has a light weight profile that measures about 0.71" at the middle of the necked down portion of the barrel.

Figure 1

Attached to the barrel is the barrel lug and the forend threaded interface.

Figure 2

Figure 3

Figure 4

The barrel lug houses the extractor components; extractor, extractor spring and cam.

Figure 5

When the action is closed, the breech face pushes the extractor forward and rotates the cam and cam pin to the positions shown in the photo below.  Also notice the notch at the rear of the lug that is engaged by the barrel catch when the action is closed.

Figure 6

The photo below shows the cam rotated down which pushed the extractor rearward.  The cam is rotated down by the spring pin which goes through the cam  and makes contact with the guides on the inside of the receiver.

Figure 7

If you look closely in the photo below you can see that there are actually five grooves for the 5R rifling.  Also notice how the extractor is higher than the bottom of the chamber.  This is needed for the extractor to seat properly in the case rim.  This also puts a little up pressure on the case as you insert or remove the cases.

Figure 8

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Frame Assembly

The frame is a steel investment casting with a phosphate finish.

Figure 9

Figure 10

Figure 11

Figure 12

I'm no H&R aficionado, but I believe this is a SB2 frame which can be identified by the skeletonized area on the stock mating surface around the stock bolt hole.

           Figure 13                                                          Figure 14
  

The white circle below identifies the guide in the side of the frame which guides the pin in the cam to push the extractor rearward.

Figure 15

Figure 16

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Stock

The stock is a polymer material that is most likely glass filled nylon.

Figure 17

Figure 18

The stock includes a grip cap that serves no clear purpose other cosmetic.

Figure 19                                                             Figure 20
  

The interface of the stock to the frame is simple with no alignment system other than the way the slight "V" shape and two curved surfaces mate together.

Figure 21

The inside of the stock has a hollow cavity which would allow you to store some basic survival gear for the unknown.

Figure 22

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Recoil Pad

Figure 23

Figure 24

Figure 25

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Stock Bolt

Figure 26                                                           Figure 27                                                        
  

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Forend

The forend is made from a polymer material which is most likely glass filled nylon.  The sling swivel stud is screwed directly into the polymer material.

Figure 28

Figure 29

Figure 30

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Forend Mount Screw

Figure 31                                                  Figure 32             
  

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Optics Mount Rail

The optics mount rail is made from aluminum and has a standard Picatinny rail profile.  The rail measures 6.0" in length and has a height of about 0.30". 

Figure 33

Figure 34

Figure 35

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Thread Protector

The thread protector is made from anodized aluminum with an internal 5/8-24 TPI thread.  The length measures 0.63".

Figure 36                                   Figure 37                                   Figure 38
     

 

Thoughts

Overall it looks like H&R has produced a simple, functional and value oriented firearm.

For more detailed photos and commentary, make sure you check out the other parts of this review and feel free to leave comments on my Reader's Comments page.  The following links are provided to help you see other parts of this review. 

• H&R 300 AAC Blackout Handi-Rifle Review: Part 1 - Introduction, Specifications and Summary
• H&R 300 AAC Blackout Handi-Rifle Review: Part 2 - What's in the Box
• H&R 300 AAC Blackout Handi-Rifle Review: Part 3 - External and Operational Features
• H&R 300 AAC Blackout Handi-Rifle Review: Part 4 - Disassembly
• H&R 300 AAC Blackout Handi-Rifle Review: Part 5 - Internal Features (this page)
• H&R 300 AAC Blackout Handi-Rifle Review: Part 6 - Range Test

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