A shop apron is also helpful to protect your clothing. Pins and springs can (and probably will) fly across the room.
AR 15 A2 CARRY HANDLE FREE
The free-float hand guard does not require the use of a delta pack or hand guard cap, as these are integral to the Free Float Tube hand guard. Had we decided to use open sights, your front sight would have had the gas block built in. In addition, since we are using a bull barrel with a free-float hand guard and without sights, we need a gas block but do not need a flash hider. These parts would not be required had we selected a Flattop. Now that we have selected the type of upper receiver (A3), we know we need the forward assist assembly and Ejection Port Cover assembly.
AR 15 A2 CARRY HANDLE INSTALL
In addition, since we are building a Varmint Rifle designed for accuracy, we want to install a bull barrel with a free-float hand guard. We chose the A3 because of its versatility. Therefore, either the AR-15 A3 or the Flattop will do. Since we want to scope your rifle, we do not want an upper receiver with a carry handle, nor do we need open sights. The Flattop is great for building any type of Varmint or Target Carbine/Rifle since any type of optic can be mounted to the Flattop.įor your project, we decided to build a Varmint Rifle in 204 Ruger. These generally do not accommodate the forward assists or Ejection Port Cover assemblies or also known as the "Slick-Sided" uppers. Has many configurations for the upper receiver with various heights of picatinny rails for mounting scopes. Also great for building any type of Varmint or Target Carbine/Rifle since any type of optic can be mounted to the Flattop. This is the current military upper and is used to build a civilian copy of the M4 (carbine with 16" barrel) or M-16 A4 (rifle with 20" barrel). Has a flattop with picatinny rail, shell deflector and requires the installation of the forward assist assembly and ejection port cover assembly.
This is a popular upper to use for building a rifle for use in shooting matches. Has a fixed carry handle, shell deflector and requires the installation of the forward assist assembly, ejection port cover assembly and the A2 sight assembly that allows for windage and elevation adjustments. This upper is ideal to build a "Retro" civilian version of the Vietnam era M-16 Rifle. Has a fixed carry handle, shell deflector and requires the installation of the forward assist assembly, ejection port cover assembly and the A1 sight assembly that allows only for windage adjustment. Here are several types of stripped upper receivers, each with different features for different applications.
The upper receiver and barrel you choose will determine the remaining parts needed. Will you be varmint hunting, plinking or competition shooting? Once you make this decision, you know what type of upper receiver and barrel you will use. Before you buy your first part, decide what kind of rifle you want.